Butylated Hydroxyanisole (Bha)
Also known as: E320, Butylated hydroxyanisole, BHA
BHA is listed by the U.S. National Toxicology Program (NTP) as 'reasonably anticipated to be a human carcinogen' based on sufficient evidence in animals (forestomach tumors).
What it is
Butylated hydroxyanisole (BHA, E320), a synthetic phenolic antioxidant.
Antioxidant preventing rancidity in fats and oils.
Why it's flagged
- NTP-listed reasonably anticipated human carcinogen
- Endocrine disruptor
- California Prop 65 listed
- FDA reassessment underway (2026)
What regulators actually say
"Butylated hydroxyanisole is reasonably anticipated to be a human carcinogen based on sufficient evidence of carcinogenicity from studies in experimental animals."
"FDA launched a comprehensive re-assessment of butylated hydroxyanisole (BHA), a chemical preservative used in food."
"BHA exhibits endocrine disrupting effects... interference with thyroid hormone metabolism and estrogen receptor signaling."
Regulatory status
United States — FDA
Permitted (21 CFR 172.110, 21 CFR 182.3169) but under active 2026 FDA reassessment.
European Union — EFSA
Authorised E320 with restrictions; under continued review.
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